Blectbolttic beflectob



Set. 6 1927.

p s. w. JENKS ELECTROLYTIC REFLECTOR Origina1-;-Fi1ed Sept. 11, 1922 S TuAa rj; JENK S;

sue Sept. 6, 1927.-

UNITED S ATES PATENT OFFICE.

swam: w. .umxs, or wasnnmrox, music! 01- comn n'na mcraonvrrc REFLECTOR.

ori in-1 no. 1,525,554, dated February 10, 1925, Serial no. ,5a1,4oa,-a1e September 11, um. muse..."

for reissue fllei'l'anaary 10, 1827. Serial In, 180,320.

' Tltisinvention relates ,to apparatus for the transmission of pictures-by-radio, andhas for its principal object means fol'fi'ichanging the intensity value ofthe light from a light source of constant intensity,-in order to produce lights and shades and half-tones on the photographic surface'upon which it imstation.

In the diagrammatic drawing herewith, 'A is a, source of light of constant intensity,

B a lens for-gathering the diverging light rays therefrom and concentrating them on the film C, after having been reflected from the metal-faced mirror D. The mirror D is located in an electrolytic bath and is connected to a source of oscillatingcurr'ent illustrated as coming from the transformer E.

The electrolytic solution is contained in'the glass jar F.

The operation of the device is as follows: With the light of uniform value reflected from the surface of the mirror D, a uniform m strength of light is obtained on the picture surface C. But when current begins to flow in the oscillating circuit a deposit is formed on the face of the mirror in minute s ecks, which tend to reduce the area of ligiit refleeting surface, and, therefore, the amount of light falling on the film C. When the current reverses, the mirror becomes the opposite pole of the oscillating circuit, and these particles are removed and'the normal strength of the light again falls on the film C. \Vhen a less strength ofcurrent passes,

- obviously there is a less deposit, and, therefore, a less interruption to the reflection of the light from the mirror.

It will be found, therefore, that the amount of light reflected from the mirror is governed by the strength of the electrolytic deposit, and as the electrolytic deposit results from the fluctuating current values in the transformer E, the amount of light which falls on the light-sensitive film C fluctuates in accord'with the impressed current values, and as the film C is m motion,v the result of the developable value of the posure on the film C varies accordingly It. is obvious that with thespeciiic at rangement shown only a single line varying "in density will be recorded on the fiim, it is to be understood that the film and r1 tasting drum are intended to represent any pinges in the apparatus at the receiving 1 suita e arrangement for produ'cing rela' tive movement between the projected light and the light receiving surface, and itwill.

brapparen't to one skilled in the art that any one-of several well known forms of a paratus may be ilsed to distribute the lig t variations over the surface in proper order to'reproduce the original icture or record.

This electrolytic deposit may be alternately added 'to' and taken from a trans parent anode-cathodgbut as this is made the Subject f a separate applicatioma d S fiP'.

2. In devices of the character described,

a source of light of fixed intensity, a light sensitive surface so located as to receive light from said source, and means whereby an electrolytic deposit alternately but lying betweenadded to and subtracted therefrom varies thevalue of light passing from said source to said film. v

3. In devices of the character described, a source of light of fixed intensity, alight receiving sur ace so located as to receive light from said source, and meanslying between whereby an e1ectrolytical--depos1t is alternately added to and subtracted therefrom tovary the amount of light passing from said source to said film.

In testimony whereof I aflix my signature.

STUART w. :JENKS. 

